НИКО

1-bus
2-railway station
3-at a party
4-in a shop
5-in a hotel

ex4
A- a popular entartainment
B-a transport system
C-museums
D-ecological problems
E-education

ex 5
1-won
2- was finished
3-has become
4-its
5-best

ex 6
1-every
2-afraid
3-enjoy
4-nothing